在线铁谱仪中的磨粒沉降机理研究

Research on the Wear Particles Depositing Mechanism of On-line Ferrograph

为给研制在线铁谱仪提供理论依据 ,建立了在线铁谱仪中的磨粒沉降运动模型 ,采用有限元法仿真了直流电磁铁磁场的分布情况 ,研究了磨粒在磨粒探测器中的沉降运动机理 ,分析了油样粘度 ηc、初始高度y0 、磨粒直径D等参数对磨粒沉积位置的影响。仿真结果表明 :在两个磁极之间存在一个夹角 β的条件下 ,在线铁谱仪既具有较高的磨粒沉淀率 ,又避免了大磨粒的“堆积”。

In order to design an on-line ferrograph, a motion model of wear particles in detector was presented, and magnetic field distribution of electromagnets was simulated by finite element method, then motion mechanism of wear particles and the factors influencing particles motion, such as viscosity ηc, initial height y0 and wear particles diameter D were investigated. Simulation results show that forming a included angle between two magnetic poles can lead to higher deposition rate of wears particles, and avoid piling up of large ferromagnetic particles in the detector entrance.